Weeds are the unwanted plants that grow along with the cultivated plants. How do they affect the crop plants?

Weeds are the unwanted plants that grow along with the cultivated plants. How do they affect the crop plants? Correct Answer All of above

Explanation:

  • Weeds are nothing but unwanted plants growing out of time and place.
  • The term weed was coined by Jethro Tull.

Weeding affect the crop plants in the following ways:

  1. Weeds compete with the crop plants for water, nutrients, space, and light
  2. Some weeds interfere even in harvesting and may be poisonous to animals and human beings.
  3. Weeds dominate other plants to grow as they acquire the resources of crop plants as well
  4. Weeds kill plants in the field before they grow

So ''all of the above'' is correct

Additional Information

  • Weeding is the process to remove out the weeds.
  • Weeding is required because weeds are competitive plants as they reduce the useful crop yield by acquiring space, fertilizers, and nutrients from the soil.

Related Questions

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative Assertion (A) : Weeds should not be allowed to grow along with the crops. Reason (R) : Weeds leave no space for plants to grow.
Read the following passage and answer the item that follows. Your answers to this item should be based on the passage only. Many farmers use synthetic pesticides to kill infesting insects. The consumption of pesticides in some of the developed countries is touching 3000 grams/hectare. Unfortunately, there are reports that these compounds possess inherent toxicities that endanger the health of the farm operators, consumers and the environment. Synthetic pesticides are generally persistent in environment. Entering in food chain they destroy the microbial diversity and cause ecological imbalance. Their indiscriminate use has resulted in development of resistance among insects to insecticides, upsetting of balance in nature and resources of treated populations. Natural pest control using the botanical pesticides is safer to the user and the environment because they break down into harmless compounds within hours or days in the presence of sunlight. Plants with pesticidal properties have been in nature for millions of years without any ill or adverse effects on the ecosystem. They are easily decomposed by many microbes common in most soils. They help in the maintenance of biological diversity of predators and human health hazards. Botanical pesticides formulated from plants are biodegradable and their use in crop protection is a practical sustainable alternative. Which of the following statements is/are correct regarding biopesticides? 1. They are not hazardous to human health. 2. They are persistent in environment. 3. They are essential to maintain the biodiversity of any ecosystem. Select the correct answer using the code given below.